<div class="ui icon buttons">
 
  <div class="ui top right dropdown button" v-on:click="showDropDown">
    <i class=""><img src="images/dropdown_btn.png"></i>
    <div class="menu">
      <div class="item" v-on:click="click_item('chat')"><i class="chat icon"></i> 发起聊天</div>
       <div class="item" v-on:click="click_item('setposition')"><i class="close icon"></i> {{position_tip}}位置信息</div>
      <div class="item" v-on:click="click_item('close_desk_call')"><i class="delete icon"></i> {{noti}}浏览器提醒</div>
      <div class="item" v-on:click="click_item('voice')"><i class="delete icon"></i>{{voice}} 声音提醒</div>
      <div class="item" v-on:click="click_item('exit')"><i class="close icon"></i> 退出系统</div>
    </div>
  </div>
</div>
